Alpha Legion Rewards of Treachury Rule Question

I just want to know if I can take a Dark Angels Paladin of the Hekatonystika. They fit the theme of my sword army well, and I've already customed two up, but it's the only thing tempting me to Dark Angels. I know it's a Centurion upgrade, so it's unlikely, but on the off chance that anyone knows officially. If not, I'll just keep it to casual theme games.